Yes. Wavelength is best known as a group party game, but you can play wavelength game online single player by using the 1-team setup above. The solo version is not the same experience as a noisy game night, because there is no team debate, but it is useful for practicing clue quality, learning how the scoring zones feel, and warming up before playing with friends.
The key difference is the role split. In a normal round, one person is the Psychic and the rest of the team guesses. In single player Wavelength, you temporarily play both roles. First you act as the Psychic: look at the hidden target and choose a clue that represents that exact place on the spectrum. Then you hide the target, pause long enough to reset your memory a little, and act as the guesser by placing the needle where that clue seems to belong.
This page is intentionally focused on solo and 1-player use. If you want the full group rules, read the How to Play Wavelength guide. If you want a large list of topics, use the Wavelength prompts list. If you want to design your own spectra, the custom prompts page is the better place to start.